Percona XtraBackup 2.0.7 was released May 6.

Percona is glad to announce the release of Percona XtraBackup 2.0.7 for MySQL on May 6, 2013. Downloads are available from our download site here and Percona Software Repositories. Percona XtraBackup is the world’s only open-source, free MySQL hot backup software that performs non-blocking backups for InnoDB and XtraDB databases.

This release is the current GA (Generally Available) stable release in the 2.0 series.

New Features:

• This version of Percona XtraBackup has implemented full support …

This little guide will describe the steps you have to take to use utf-8 in a complete web application using MySQL and PHP. The Database You have to specify the utf8 character set on all tables and text columns in your database. This will ensure that MySQL stores and retrieves the values encoded in UTF-8. [...]

It has been a little over a month since I joined 10gen and I want to share some of my impressions now that some of the newness has worn off and I am settling into my role.  For context, in March I left Oracle and my position as Director of Product Management for the MySQL database to assume a similar role at 10gen working with MongoDB.  I still have many good friends and respected colleagues on the MySQL team and truly believe them and the MySQL product to be in good hands under Oracle.  That said, here are my thoughts on my move and on the database market as a whole (note the emphasis here is on use case vs proprietary and open source):

10gen reminds me very much of MySQL AB prior to the Sun acquisition. 
I joined MySQL in 2005, a full 3 years before the Sun acquisition. Back then, there was little distinction across the titles and roles within the MySQL team. Basically, …

Back when the first version of the MariaDB Java Client was released, someone asked in the comments about the performance characteristics of the driver compared to ConnectorJ. I answered with hand-waving, saying that nobody does anything stupid, the performance of the drivers would be roughly the same, but I promised to measure it and tell the world one day. And now that day has come. The day where three MySQL JDBC drivers (ConnectorJ, MariaDB JDBC, and Drizzle JDBC) are compared against each other. Unlike the server, which gets benchmarking attention all the time, there is no standard benchmark for connectors, so I needed to improvise, while trying to keep the overhead of the server minimal. So I did something very primitive to start. I used my two favorite queries:

• DO 1 — this one does not retrieve a result set, and thus can be seen as a small “update”.
• SELECT 1 — the minimal …

Mon, 2013-05-06 14:51 About the Author

Back when the first version of the MariaDB Java Client was released, someone asked in the comments about the performance characteristics of the driver compared to ConnectorJ. I answered with hand-waving, saying that nobody does anything stupid, the performance of the drivers would be roughly the same, but I promised to measure it and tell the world one day. And now that day has come. The day where three MySQL JDBC drivers (ConnectorJ, MariaDB JDBC, and Drizzle JDBC) are compared against each other. Unlike the server, which gets benchmarking attention all the time, there is no standard benchmark for connectors, so I needed to improvise, while trying to keep the overhead of the server minimal. So I did something very primitive to start. I used my two favorite queries:

• DO 1 -- this one does not retrieve a result set, and thus can be seen as a small "update".
…

IntroductionMySQL replication slave features  a powerful capability of ignoring conflicts like duplicate key error, key not found errors etc. while applying row events.  This is exceptionally useful while doing row based replication(RBR) from the master when the slave already contains some data which may conflict with the data coming from the master. In MySQL 5.7 we extend this capability while applying row events from mysql-binlog files using mysqlbinlog tool.  This enhancement will prevent such errors from aborting mysql client in case of conflicts like the ones mentioned above.

RationalePrior to MySQL 5.7 we have been using the mysqlbinlog tool as follows.

shell$> mysqlbinlog master.000001|mysql -uroot -hexample.com -ps3cret  

This allows us to pipe the output of mysqlbinlog to mysql, and works as long as the row events from the mysqlbinlog do not conflict with …

Whether you are a developer who wants to use MySQL and PHP to build and maintain websites or if you want to learn how MySQL and PHP can be used for the rapid prototyping and development of dynamic websites, the MySQL and PHP - Developing Dynamic Web Applications training course is for you.

This four day, live, instructor-led course is available as a:

• Live-virtual event: You can take this course from your desk - no travel required. Choose from a selection of events already on the schedule.
  
• In-class event: Travel to an education center to take this course. Below is a selection of of the events already on the schedule.
  

In my previous post, I wrote about when data gets loaded in and out of cache. The goal of caching is to avoid having to perform disk IO, which if we are talking about hard drives, each operation is about 20 million times slower than CPUs or about 100 thousand times slower than memory.

So today I want to cover the subject of when are we required to do IO? But before I get there I first have to describe how IO works on all our modern operating systems.

An Introduction to Buffered IO

When you read or write to a file, by default you are speaking to a layer in between you and your disks called buffered IO. This layer is designed to increase performance and adds important features such as caching. Without going into this in detail, it’s important to note that:

• When you …

dm-cache is (albeit still classified “experimental”) is in the just released Linux 3.9 kernel. It deals with generic block devices and uses the device mapper framework. While there have been a few other similar tools flying around, since this one has been adopted into the kernel it looks like this will be the one that you’ll be seeing the most in to the future. It saves sysadmins the hassle of compiling extra stuff for a system.

A typical use is for an SSD to cache a HDD. Similar to a battery backed RAID controller, the objective is to insulate the application from latency caused by the mechanical device, the most laggy part of which is seek time (measured in milliseconds). Giventhe  relatively high storage capacity of an SSD (in the hundreds of GBs), this allows you to mostly disregard the mechanical latency for writes and that’s very useful for database systems such as MariaDB.

That covers writes (for the moment), but …

This is the required post about things I observed during this years MySQL conference.

Things that are awesome:

• The tables in sessions. I think these were here last year. They are still awesome this year.
• The new style power plugs. They solved the problem of people tripping over daisy chained power strips and the strips being accidentally turned off.
• Massive quantities of coffee and real cream.

Things that can be improved:

• Lunch tickets. I overheard the same conversation a dozen times about people not being able to find their lunch tickets or not really knowing about them.
• Make badges reversible. A badge under observation will be facing the wrong way.

Things that just bumped me:

• The music is different this year. Now it makes me feel like a teenager struggling with a breakup.
• My secret clean bathroom has been …